Rare Earth

Is complex life such that exists with animals on Earth rare in the Universe? If so why don't we make sure not to trash our only home? A panel of experts, including Don Brownlee, Roger Carasso, Robin Hanson, Mark Jacobson, Derrick Jensen, David Klein, Bill McKibben, Guy McPherson, Bill Patzert, Gary Snyder, Jill Stein, Peter Ward, and Josh Willis discuss these topics.